sklearn.metrics.average_precision_score¶
- sklearn.metrics.average_precision_score(y_true, y_score)¶
Compute average precision (AP) from prediction scores
This score corresponds to the area under the precision-recall curve.
Note: this implementation is restricted to the binary classification task.
Parameters : y_true : array, shape = [n_samples]
True binary labels.
y_score : array, shape = [n_samples]
Target scores, can either be probability estimates of the positive class, confidence values, or binary decisions.
Returns : average_precision : float
See also
- roc_auc_score
- Area under the ROC curve
- precision_recall_curve
- Compute precision-recall pairs for different probability thresholds
References
[R130] Wikipedia entry for the Average precision Examples
>>> import numpy as np >>> from sklearn.metrics import average_precision_score >>> y_true = np.array([0, 0, 1, 1]) >>> y_scores = np.array([0.1, 0.4, 0.35, 0.8]) >>> average_precision_score(y_true, y_scores) 0.79...